There is "something" there. The marker reads "restored remnant and replica" so I'm not exactly sure whether the raised ground in the park is actually an original earthwork or something created for the park.
But here are some more visual aids that might help show what is there.
View attachment 299760View attachment 299761View attachment 299763
View attachment 299764
Yeah I saw right off and said "Restored remnant my foot!" They didn't restore nothing by the looks of it, they just landscaped what little is left of the remains. Restored would be building it back to its CW appearance in that section, and they have enough left they could haul in some soil and materials and build it back, but I doubt they ever will. It actually wouldn't be that hard or expensive.